EP 0325175 A3 19910911 - MULTI-CHANNEL STEREOPHONIC SYSTEM
Title (en)
MULTI-CHANNEL STEREOPHONIC SYSTEM
Publication
Application
Priority
US 14528488 A 19880119
Abstract (en)
[origin: US4837825A] A multi-channel stereophonic system in which different audio signals are produced and caused to converge upon the ear of the listener at selectively spaced time intervals so as to enhance the realism of the sound impressed upon the listener. A pair of auxiliary speakers are arranged in front of and above a pair of conventional main speakers, and signals are transmitted from an audio source in selected phase relationship to each of the speakers, the sound produced at least by each of the auxiliary speakers being selectively reflected off of sound-reflective surfaces in order to physically separate the added sound produced by the auxiliary speakers from the conventional stereo speakers.
IPC 1-7
IPC 8 full level
H04R 5/02 (2006.01); H04S 3/00 (2006.01); H04S 5/02 (2006.01)
CPC (source: EP US)
Citation (search report)
- [Y] DE 3124595 A1 19830105 - BRENDEL ERWIN
- [Y] EP 0100805 A1 19840222 - CHESNARD HENRY [FR], et al
- [A] US 4673057 A 19870616 - GLASSCO JOHN M [US]
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
US 4837825 A 19890606; EP 0325175 A2 19890726; EP 0325175 A3 19910911; JP H01238300 A 19890922
DOCDB simple family (application)
US 14528488 A 19880119; EP 89100578 A 19890113; JP 1095689 A 19890119